<template>
    <div>
         <!-- 面包屑导航区域 -->
       <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
       </el-breadcrumb>

       <!-- 卡片视图区 -->
       <el-card>
           <el-row>
               <el-col>
                   <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
               </el-col>
           </el-row>
           <!-- 表格区域 -->
           <tree-table class="treeTbale" :data="cateList" :columns="columns" :selection-type='false' :expand-type='false' show-index index-text='#' border :show-row-hover='false'> 
               <template slot="isok" slot-scope="scope">
                <i v-if ='scope.row.cat_deleted === false' class="el-icon-circle-check" style="color:lightgreen"></i>
                <i v-else class="el-icon-circle-close" style="color:red"></i>
               </template>
               <template slot="order" slot-scope="scope">
                   <el-tag v-if="scope.row.cat_level === 0" >一级</el-tag>
                   <el-tag v-else-if="scope.row.cat_level === 1" type="success">二级</el-tag>
                   <el-tag v-else type="warning" >三级</el-tag>
               </template>
               <template slot="opt" slot-scope="scope">
                   <el-button type="primary" icon="el-icon-edit" size="mini" @click="editCate(scope.row)">编辑</el-button>
                   <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeCateById(scope.row.cat_id)">删除</el-button>
               </template>
           </tree-table>

           <!-- 分页区域 -->
           <el-pagination
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
            :current-page="queryInfo.pagenum"
            :page-sizes="[3, 5, 10, 15]"
            :page-size="queryInfo.pagesize"
            layout="total, sizes, prev, pager, next, jumper"
            :total="total">
           </el-pagination>
       </el-card>
       
       <!-- 添加分类 -->
        <el-dialog
        title="添加分类"
        :visible.sync="addCatedialogVisible"
        width="50%" @close="addCatedialogClose">
            <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
                <el-form-item label="分类名称：" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类：">
                    <el-cascader
                        v-model="addCateKeys"
                        :options="addCateList"
                        :props="parentProps "
                        @change="addCateChange" clearable>
                    </el-cascader>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addCatedialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
            </span>
        </el-dialog>
        
        <!-- 修改商品分类的对话框 -->
        <el-dialog title="修改分类" :visible.sync="editCateDialog"  width="50%" @close="editCateClose">
            <el-form ref="editCate_ref" :model="editCateList" :rules="editCate_rules" label-width="100px">
                <el-form-item label="分类名称:">
                    <el-input v-model="editCateList.cat_name" prop="cat_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editCateDialog = false">取 消</el-button>
                <el-button type="primary" @click="editCateInfo">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            queryInfo:{
                type:3,
                pagenum:1,
                pagesize:5
            },
            cateList:[],
            total:0,
            // 树形表格
            columns:[
                {
                    label: '分类名称',
                    prop: 'cat_name'
                },
                {
                    label: '是否有效',
                    type: 'template',
                    template: 'isok',
                },
                {
                    label: '排序',
                    type: 'template',
                    template: 'order',
                },
                {
                    label: '操作',
                    type: 'template',
                    template: 'opt',
                },
            ],
            addCatedialogVisible:false,
            addCateForm:{
                 cat_name:'',
                 cat_pid: 0,
                 cat_level:0
            },
            addCateFormRules:{
                cat_name:[{ required: true, message: '请输入分类名称', trigger: 'blur' }]
            },
            addCateList:[],
            addCateKeys:[],
            parentProps:{
                expandTrigger: 'hover',
                value:'cat_id',
                label:'cat_name',
                children:'children',
                checkStrictly:true
            },
            editCateDialog:false,
            editCate_rules:{
                cat_name:[{ required: true, message: '请输入分类名称', trigger: 'blur' }]
            },
            editCateList:{},
            
        }
    },

    created(){
        this.getcateList()
    },

    methods:{
        // 获取商品分类
        async getcateList(){
            const {data:res} = await this.$http.get('categories',{params:this.queryInfo});
            if(res.meta.status !== 200){return this.$message.error('获取商品分类失败')};
            this.cateList = res.data.result;
            this.total = res.data.total;
        },
        // 监听页数变化
        handleSizeChange(newSize){
            this.queryInfo.pagesize = newSize;
            this.getcateList();
        },
        handleCurrentChange(newPage){
            this.queryInfo.pagenum = newPage;
            this.getcateList();
        },
        // 控制展示添加分类的对话框
        showAddCateDialog(){
            
            this.getAddCateList()
            this.addCatedialogVisible = true;
        },
        async getAddCateList(){
            const {data:res} = await this.$http.get('categories', {params:{type:2}});
            if(res.meta.status !== 200){return this.$message.error('获取商品分类列表失败')};
            this.addCateList = res.data;
        },
        // 监听级联change事件
       addCateChange(){
           if(this.addCateKeys.length > 0){
               this.addCateForm.cat_pid = this.addCateKeys[this.addCateKeys.length-1];
               this.addCateForm.cat_level = this.addCateKeys.length;
               return
           }else{
               this.addCateForm.cat_pid = 0;
               this.addCateForm.cat_level = 0; 
           }
       },
       addCate(){
           this.$refs.addCateFormRef.validate(async valid => {
               if(!valid) return;
               const {data:res} = await this.$http.post('categories',this.addCateForm);
               if(res.meta.status !== 201){return this.$message.error('创建商品分类失败')};
               this.$message.success('创建成功')
               this.addCatedialogVisible = false;
               this.getcateList();
           })
        },
       addCatedialogClose(){
            this.$refs.addCateFormRef.resetFields();
            this.addCateKeys = [],
            this.addCateForm.cat_pid = 0;
            this.addCateForm.cat_level =0;
       },
       editCate(cate){
           this.editCateList = cate;
           this.editCateDialog = true;
       },
       editCateClose(){
        this.$refs.editCate_ref.resetFields();
       },
       editCateInfo(){
          this.$refs.editCate_ref.validate(async valid => {
               if(!valid) return;
               const {data:res} = await this.$http.put('categories/'+this.editCateList.cat_id,{cat_name:this.editCateList.cat_name});
               this.editCateDialog = false;
               this.$message.success('更新成功');
               this.getcateList();
           }) 
       },
       async removeCateById(id){
            // console.log(id);
            const confirmRes =await this.$confirm('此操作将永久删除该商品分类, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(error => error);
            if (confirmRes !== 'confirm'){return this.$message.info('已取消删除商品分类')};
            const {data:res} =await this.$http.delete('categories/'+id)
            if(res.meta.status != 200) {return this.$message.error('删除失败')};
            this.getcateList();
            this.$message.success('删除成功')
        },
    }
}
</script>

<style lang="less" scoped>
.treeTbale{
    margin-top: 15px;
}

.el-cascader{
    width: 100%;
}
</style>